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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share |
Computation of basic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Three Months Ended | ​ | For the Six Months Ended
​ | ​ | June 30, | ​ | June 30,
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019
Numerator (basic and diluted): |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Net income | ​ | $ | 531,667 | ​ | $ | 353,681 | ​ | $ | 832,105 | ​ | $ | 674,833
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Weighted-average common shares outstanding – basic | ​ |  | 74,205 | ​ |  | 77,613 | ​ |  | 74,611 | ​ |  | 78,047
Effect of stock options (1) | ​ |  | 628 | ​ |  | 799 | ​ |  | 635 | ​ |  | 807
Weighted-average common shares outstanding – assuming dilution | ​ |  | 74,833 | ​ |  | 78,412 | ​ |  | 75,246 | ​ |  | 78,854
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per share: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Earnings per share-basic | ​ | $ | 7.16 | ​ | $ | 4.56 | ​ | $ | 11.15 | ​ | $ | 8.65
Earnings per share-assuming dilution | ​ | $ | 7.10 | ​ | $ | 4.51 | ​ | $ | 11.06 | ​ | $ | 8.56
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Antidilutive potential common shares not included in the calculation of diluted earnings per share: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Stock options (1) | ​ |  | 341 | ​ |  | 184 | ​ |  | 348 | ​ |  | 188
Weighted-average exercise price per share of antidilutive stock options (1) | ​ | $ | 378.84 | ​ | $ | 357.18 | ​ | $ | 378.29 | ​ | $ | 357.33
(1) | See Note 11 for further information concerning the terms of the Company’s share-based compensation plans.
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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